Bug 403495

SUMMARY

go a setup with two screens, both configured differently (panels, folder view).
after switching Xorg driver from nouveau to nvidia, the left/second screen had the configuration of the right/first, and the right/first screen had neither panel nor configured wallpaper anmyore.
the config of the left/second screen is inaccessible, but in the "add widgets" I see the widgets of that screen as still in use (counter label shows), but I can't neither access nor delete them.

I'm not quite sure, but the identifiers shown in 
System Settings -> Display and Monitor -> Displays
now are DP-4 and DP-5 whereas IIRC before they were something with -1 and -2.

Nevertheless, that shouldn't cause such an issue.
Even after switching the Xorg driver there are still two screens in the same position to each other, so whatever happened the configuration of "left screen" and "right screen" should not change suddenly, whatever the identifier.

EDIT: while looking at the System Settings' section, I notice that there's a DP-3 shown as inactive. Now, where does that come from? 
EDIT 2: Switching Primary display makes the screen configuration switch screens suddenly (left config w/ panel and folder view suddenly right and vice versa).



STEPS TO REPRODUCE
1. switch Xorg driver (from nouveau to nvidia)
2. log back in
3. 

OBSERVED RESULT

screen configuration messed up, for the left screen beyond access, for the right moved now to the left, and the right now completely w/o panels etc

EXPECTED RESULT

left screen and right screen should stay as they were before -- after all, only the Xorg driver changed which is for below plasmashell and should not affect the screen configuration in a DM

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION